Optical disc apparatus and recording power determining method thereof

Abstract

A method of determining a recording power used to record information to an optical disc, includes carrying out test recording which records predetermined data to a predetermined area of the optical disc to determine the recording power, and recording predetermined data with a power equal to or more than the determined recording power to an area adjacent to the predetermined area.

1. A method of test recording to determine a recording power used to record information to an optical disk by test recording which records predetermined data to a plurality of areas in a test recording area of the optical disk, said method comprising:
 moving a light spot on the optical disk in a direction from an outer periphery to an inner periphery of the optical disk to record the predetermined data to the test recording area, 
 wherein usage of the test recording area moves from an inner part of the plurality of areas towards an outer part of the plurality of areas to carry out the test recording, and 
 wherein the recording power for the test recording is changed from a higher power to a lower power for each of the plurality of areas in the test recording area. 
 
   
   
     2. A method of test recording to determine a recording power used to record information to an optical disk by test recording which records predetermined data to a plurality of areas in a test recording area of the optical disk, said method comprising:
 moving a light spot on the optical disk in a direction from an outer periphery to an inner periphery of the optical disk to record the predetermined data to the test recording area; and 
 moving the light spot on the optical disk in a direction from the inner periphery to the outer periphery of the optical disk to record the predetermined data in the test recording area, 
 wherein the optical disk includes at least two recording layers:
 for the test recording on one recording layer, the light spot is moved in the direction from the outer periphery to the inner periphery of the optical disk, wherein usage of the test recording area moves from an inner part of the plurality of areas towards an outer part of the plurality of areas; and 
 for the test recording on another recording layer, the light spot is moved in the direction from the inner periphery to the outer periphery of the optical disk, wherein usage of the test recording area moves from the outer part of the plurality of areas towards the inner part of the plurality of areas, and 
 
 wherein the recording power for the test recording is changed from a higher power to a lower power for each of the plurality of areas in the test recording area. 
 
   
   
     3. An apparatus for recording information to an optical disk, said apparatus comprising:
 a power determining section operable to determine a recording power used to record information to the optical disk by test recording which records predetermined data to a plurality of areas in a test recording area of the optical disk, 
 wherein said power determining section is operable to move a light spot on the optical disk in a direction from an outer periphery to an inner periphery of the optical disk to record the predetermined data to the test recording area, and usage of the test recording area moves from an inner part of the plurality of areas towards an outer part of the plurality of areas to carry out the test recording, and 
 wherein the recording power for the test recording is changed from a higher power to a lower power for each of the plurality of areas in the test recording area. 
 
   
   
     4. An apparatus for recording information to an optical disk, said apparatus comprising:
 a power determining section operable to determine a recording power used to record information to the optical disk by test recording which records predetermined data to a plurality of areas in a test recording area of the optical disk, 
 wherein the optical disk includes at least two recording layers:
 for the test recording on one recording layer, the power determining section is operable to move a light spot in a direction from an outer periphery to an inner periphery of the optical disk to record the predetermined data to the test recording area, wherein usage of the test recording area moves from an inner part of the plurality of areas towards an outer part of the plurality of areas; and 
 for the test recording on another recording layer, the power determining section is operable to move the light spot in a direction from the inner periphery to the outer periphery of the optical disk to record the predetermined data to the test recording area, wherein usage of the test recording area moves from the outer part of the plurality of areas towards the inner part of the plurality of areas, and 
 
 wherein the recording power of the test recording is changed from a higher power to a lower power for each of the plurality of areas in the test recording area.